What is the probability that a family of five children will have them in alternating order

Some children are considerably taller than their parents. Basketball legend, Wilt Chamberlain, was a towering 7’1“. Strangely, neither of his parents stood above 5’9“. Of course, children can be much shorter than their parents, too. So how do a bunch of genes work together to determine our height? Let’s say, for the sake of simplicity, only three genes control our height. We will call them A, B, and C. An uppercase letter, like A, means “tall“. A lowercase letter, like a, means “short“. Remember that we have two copies of every gene, one from dad and one from mom. Keeping that in mind, we would have 6 copies of these 3 genes. Our final height is then an average of the number of “tall“ and “short“ copies we inherit. For an example, let’s take a father whose gene makeup is AaBbCc and a mother with aaBBCc. With 3 “tall“ and 3 “short“ copies each, both are of average height. How tall will their kids grow? Which copy of each gene we inherit from our parents is random. In this family, the children will most likely inherit 3 “tall“ and 3 “short“ copies. Like their parents, they will be average height. But this will not always be the case. There is a smaller chance that their child could inherit five “tall“ copies, ABC from dad and aBC from mom. This child will be quite tall. On the other hand, dad could pass down abc and mom could pass down aBc. With five “short“ copies, this child would be considerably shorter. Imagine how many possibilities there would be if twenty genes controlled our height! All the burden of our stature cannot be placed solely on our genes. Many factors contribute to our final adult height. These are called Environmental Effects. They act on our “genetic height“ to make us taller or shorter. Some of these factors are at work very early, before we are even born! A mother’s health while she is pregnant is thought to be a key player. Poor diet and toxic substances, like alcohol and nicotine, can be harmful to the growth of her child. After we are born, healthy eating habits are vital in reaching our maximum height. Avoiding drugs, environmental pollutants, and childhood illnesses is important. As is getting enough exercise and sleep. Many of our traits follow a similar pattern. They are a blending of lots of different genes as well as our environment. Is this also true regarding how athletic we are? Sure. As we just talked about, our genes are important in designing our bodies. Height is important for success in sports like basketball and gymnastics. Endurance and lean muscles are critical to a long distance runner. But even at seven feet tall, you may not excel at basketball. Many things can affect how successful we are at different activities. #MolecularBiology #Proteins #genomics #genes #Genetics #GeneStructure #GeneticsLecture #DNA #genome #Eukaryotes #alleles #geneticCode #Cancer #geneExpression #GeneticExamQuestionsSolutions #GeneticTesting #Genetics101 #Chromosomes #gene #chromosome #genotype #ProbabilityMeasurementSystem #GeneticsExamQuestionsSolutions #genomes #phenotype